Does anyone know of any great begineers guide books to karting? preferably something with the mechanics and technical information of the kart and some tips on buying a new/used kart?

Welcome to the sport of karting. While books are good to look at and get some advice, if you want to get off to a quick start with your karting career you should give some thought to visiting a kart shop that offers the whole package, advice, selling you parts, showing you how to do maintenance, kart set up, chassis tuning, and most importantly be at the track where you really need the help. In a nut shell start a relationship with a true kart shop, you will find that this will go a long way and save you a lot of time and money down the road.
Always remember, buying from a discount store or off the internet is great if you don't think you will even need help.

Good luck and I am sure GSKA is looking forward to having you join the family and make your stay in karting a great time.
RS